关键词: 制动疲软；真空助力器；电子真空泵控制逻辑；制动性能测试；新能源商用车

Abstract: With the increasingly severe environmental problems, the electrification of commercial vehicles has gradually become a development trend. The rapid development of new energy commercial vehicles is accompanied by various problems, and weak braking has always been a common problem for such vehicles. This article introduces a case of weak braking for the truck. Multiple influencing factors affecting weak braking are presented based on the system of braking and the vehicle layout, and the improvement strategies are proposed. Through the vehicle braking performance test verify the effectiveness of the improvement proposals. The analysis method and solutions in this paper provide a certain reference for this kind of problems in the future.

Key words: Weak braking; Vacuum booster; Electronic vacuum pump control logic; Braking performance test; New energy commercial vehicle